35 Ill. Adm. Code 203.1060
Available Growth Margin
Section
203.1060 Available Growth Margin
"Available growth margin" means the portion which
remains of any emission allowance for new or modified major stationary sources
expressly identified in the attainment demonstration approved by the USEPA
under section 172(c)(4) of the CAA (42 U.S.C. 7502(c)(4)) for a particular
pollutant and area in a zone (within a nonattainment area) to which economic
development should be targeted, in compliance with section 173(a)(1)(B) of the
CAA (42 U.S.C. 7503(a)(1)(B)).